A three-car crash at Mile Marker 13 allegedly caused by an alcohol-impaired woman who was airlifted to Miami slowed traffic to a crawl for more than three hours in both directions Tuesday night, according to the Florida Highway Patrol.

Troopers reported Wednesday that Rebecca Rouseff, 35, of Fort Lauderdale, was driving a 2006 Nissan north at Mile Marker 13.5 when she hit the left side of a 2001 Chevrolet driven by Michael Lyons Jr., 30, of Key West.

The Nissan continued on and struck a third car -- a 2003 Chevrolet driven by Jeff Allen, 32, also of Key West, according to a press release.

The highway was blocked in both directions for two hours as rescue crews worked to free and later airlift Rouseff to Kendall Regional Medical Center in Miami, where she was admitted in stable but serious condition, according to the press release.

Her immediate condition was not available on Wednesday.

Allen and Lyons were taken to Lower Keys Medical Center on Stock Island in stable condition, the release states.

Rouseff reportedly was not wearing a seat belt, but Lyons and Allen were, the release states.

Troopers suspected Rouseff of being impaired by alcohol, but not Lyons nor Allen, according to the release.

Traffic was backed up in both directions until 8 p.m., said Monroe County Sheriff's Office spokeswoman Deputy Becky Herrin.

"Traffic was open to alternating traffic by 6 p.m., but was still congested for a while thereafter," Herrin said.